Antonio Abad Lugo Machín (11 February 1903, in Sagua la Grande, Cuba – 4 August 1977, in Madrid, Spain) was a Spanish-Cuban singer and musician. His version of El Manisero, recorded in New York, 1930,
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcb619d48dc18f5f97de96883feeb286f247bd67592463301e88d99ee5a053b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5cc15c6c-2a61-4821-870a-ba51f3941d69.json and https://artists.proofprofile.net/proofs/artist/5cc15c6c-2a61-4821-870a-ba51f3941d69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vintage Cuba No. 81 - EP: Con Los Brazos Abiertos
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd74efbf7ab1a48d1bcc317666dff5534828070d399435e32a47d7e73d29918. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZZ42170657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd839c051c4b0df3c109058d34c2675101c575da018b05da1755ba1fd688390b4. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZZ42170674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ac4717fb93718d65641493459025149f7136c92ef43ddd5f5221f16370c9d8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZZ42170690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59b0e09c6fafa0a3ab1a928e88ab80350862b52333695c6eb65ef4c62c96ab1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b77c25893d9c99a0c2da64fbc23994f62cf196377f875a1102fdfb7f6e07c4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc93749a1e4a0e8f8c06c9124ca0b59d318e163a7a7d675cb7a0439bd29b21e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331fc11500264f898301bfcd775f05a82612de43ee94b8a16bead90e3e1e31e0. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b2f3fffcfb87b871f82f01093988f5898285e8faa1dbd4e6c2bf64fd933c08. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa580da466c8b8920d9860fc6dc3a4b3752f17fb676883c5ebf42fc000616469c. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74cb7f04a0736da890dd2395750184d4ab9ab8a7d63903f38faacd2935eaef5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe284bfc78472f9de9061c8232aedea19150e1e08cb6e78ca8bfea05cc1d0c2d9. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5371410001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2046bf7ba50ad5a40eb5db5415551d14bf8380fa0008bc99e4e98eb8f25e7400. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:36:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb53e864304655c0324a6027be8714bb2bc5c241614d3685d9382e73db5f5867. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59b0e09c6fafa0a3ab1a928e88ab80350862b52333695c6eb65ef4c62c96ab1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4479c47d6dc26ab7dedf143a0adcf43993496ea2f6e324e2054fec6a639d64ab. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7182d7debb50e9829a39cdb5bf20a24c69734d67b69d534bdebfedadbf37527b. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T12:59:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fcb3d7fc24e0a11e9067557f974e5f2013046abfe1529ac3edf732e9da2bb50. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581010084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab85c423b20f7896cd2f57eb4d37a4ae87708e94151b8a31228dffe302f9984d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581110041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0b4e34d1e3f5d24136209f1e1be1a15c83e56f142de5dcdd26739282611a4f. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5026900127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407587ed6302df0fab9bfebc01d717bf5f3241ce876a958e372d909ad0b20adb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5026900130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cdbb474eb3c6d42b5722419225e0e167ac2f4f1062c19d9ebb06d4da5090ff. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5026900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5dcd2f3ff199e736ad7d1ec213bb0597b74734f75c38d50f73700030343224. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5026900137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca500f04171f0679ff1cfe197e50edd0606cd18e0c3e55a3b6290e84433e7cd6. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5026900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967cd999130e134e452b9ffd2d16d185a7e16cb2126342c55e70b23bd00974d1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7581310082.
Cancionero de Oro: Fiel Amigo. Sus Primeros Éxitos en España, Vol. 6
Cancionero de Oro: Angelitos Negros. Sus Primeros Éxitos en España, Vol. 2
Las 50 Mejores Grabaciones De Antonio Machín En Discophon (1903-1977)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab2be0d35d50aaee356d06c61fc12442ab3df13102fd861e6a89b238300cf7a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES6340900413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953edc9cae1d25688c57b958c79d4de11e0629a6643600bb958819f15cf0590a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES6340900416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938a20f0d0a7bcb3a0fb19a1f97f4a11d9f893433831490fdaf94efc4c6284fb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES6340900394.
Antonio Machin, Vol. 4 (1951-1955 Remastered)
Antonio Machín, Vol. 2 (1949-1950 Remastered)
Antonio Machin, Vol. 3 (1947-1950 Remastered)
Espérame en el Cielo (Bolero) - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622773f25c39d1585a0bf42eacbb986b52af6cacb738708d1523b90a6a795b64. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5330103606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917dc6b62a1a83ffc63552646957efafc860dd9125d2b01733556c2683e48ba8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:15:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5330103619.
Antonio Machín. Todas Sus Grabaciones Vol.1 Y 2 (1941-1947)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8f5c87fadd809ad0a1c9620eadeb24f8c8563f70c11c88a9a928776c500ffb. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:45:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7930208005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b27a939792a072399e705ab0ff357c3d03d9862c025ada2dc10b115172eee6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7930208002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d7d251ff08642d145a93242de673183a24ecce8d5878cccec6f0ccb51ee79ee. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7930207974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9aa689b932cb041c8b67439e0032e116fe5dd0549400ccd71fade661d07b32. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:29:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7930208015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617dda9c7169f6462e4dcd8dcd613774fe45a7f178c1edbe39ff2e1384556465. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7930207992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f66a588fdd427fb172dd433753353c8073c0b5a17ac4f57cc31a45afec4164. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES64A0824611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab80b96f929fe5885bbf4133e636eb17f98d3ef4144daabb5b52db0e2ed57faa. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81018141.
Vintage Music No. 64 - LP: Antonio Machín
Los Mejores Boleros Latinos de Antonio Machín
The Music of Cuba / The Best of Antonio Machín
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c8340d5789bed3d7eeba655be9c4c77d48afd3b6f501bef9731857d1fbf346. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR6V81371798.
Boleros y Canciones : Quizas, Quizas, Quizas
Ritmos Latinos, Vol.2 (Camarera de mi Amor)
Angelitos Negros (La cancion de tu vida)
Los 15 Mejores Boleros de Antonio Machín
Antonio Machín Essential: The Ultimate Collection
Very Best of Antonio Machín, Vol. 2 (Remastered)
Very Best of Antonio Machín, Vol. 1 (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf598d9c9fcfa197e58d8c82029311ba386bceba382d39527c01a9a10aec7e060. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5621501057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6ca3d544d41ae450ed897a5f4d01229ba23a607ccf69efb8e53ea09ef4ff91. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5621501112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0443022d135e28caaf4318f621bd7323e6341875a63582014e28c5a80b4d88bd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5621501120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baa469f97760aa4daf67dbb9857aa2c9c3e15d61f212a442794afadd2ec287f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5621501122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d83a6228dab3a3d052ecfc4fa809c8dc23f44f54debf62dd939d8d57193b01. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1806194.
The Very Best of Antonio Machín (Remastered)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b155216e364f2b3aa559e9f61461a74c63ac970b1a7a7a78860df611fe367d8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXO11948046.
El Son Cubano - Los Boleros De Antonio Machin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c450cd335bcd9ae481d6365fd6ccc16e28b9cdcc9da3a1be9dbb481bc5b1587. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLHR52118197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd0a693a4662ecbd16d6ad8997842a3365fe32615fba430a02fdbef983dae0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5372100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8cd0a693a4662ecbd16d6ad8997842a3365fe32615fba430a02fdbef983dae0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5372100066.
Essential Classics, Vol. 17: Antonio Machín (Remastered 2022)
Essential Classics, Vol. 17: Antonio Machín
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324bb0961c655ad027781ca3ca7839412cdfe5a46949fccff01abc98da5ec508. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5372310064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324bb0961c655ad027781ca3ca7839412cdfe5a46949fccff01abc98da5ec508. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5372310064.
Verano Rumbero - Antonio Machín Voz y Sentimiento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcba01f25a94b2500830841b63358b0d111b5aeaac6faa5c3bfa5110471c6edd. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5372310115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65ed8cbb9934ed0c8c95842262f87bd3963e2b107fe9a89b6379c34f1f0d5a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5831610459.
100 Años de Boleros con La Sonora Matancera (1924-2024)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69b9924480dd6652335566fa317a332d4378db37576bda330f54f6ae6defbb6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PEMG95401011.
40 Años de No. 1 en Español: Los 50's, los 60's, los 70's y los 80's, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110a63f9465f9ae882ec25b902a8916fcb592600e945a1662bd7fb4e99183e6b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5371610015.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch